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  1. Phytogeography of Nebraska. 1. General survey by Roscoe Pound and Frederic E. Clements.
    By: Pound, Roscoe, - Clements, Frederic E.
    Edition: 2d ed.
    Publication info: Lincoln, Neb.Published by the Seminar1900
    Contributed by: Robarts - University of Toronto (archive.org)
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